Goethel tells WMUR-TV there was no obvious signs of trauma. She has contacted state and federal officials.

She says the timing is strange because officials are investigating the death of more than 50 harbor seals that have washed up on beaches in New Hampshire, Maine and Massachusetts in the past week or so.

Federal officials say that’s more than double the normal number. The cause of the deaths remains a mystery.

There was no word on whether the death of the tuna is connected to the seal deaths.